AU2015343845A1

AU2015343845A1 - Composition for differentiation induction of adipocyte containing stem cell-derived exosome, regeneration of adipose tissue, and skin whitening or wrinkle improvement

Info

Publication number: AU2015343845A1
Application number: AU2015343845A
Authority: AU
Inventors: Yong Woo Cho; Ji Suk Choi; Eun Ji Kim; Jun Sung Kim; Kyoung-Soo Lee; Seong Hyun Yang; Hwa In YOON
Original assignee: Exostemtech Co Ltd
Current assignee: Exostemtech Co Ltd
Priority date: 2014-11-07
Filing date: 2015-11-09
Publication date: 2017-04-27
Anticipated expiration: 2035-11-09
Also published as: CN107106613A; CN118161444A; EP3453382B1; JP6683700B2; RU2750695C2; JP6847080B2; RU2710373C2; US10071050B2; EP3189828A4; RU2019131867A3; AU2015343845B2; AU2017202287B2; EP3453382A1; EP3189828B1; JP2021020968A; US20170209365A1; CN111773173B; JP2018184446A; RU2017116138A3; AU2017202287A1

Abstract

The present invention relates to a pharmaceutical composition for adipocyte differentiation induction and/or adipose tissue regeneration comprising, as an active ingredient, an exosome extracted from a stem cell which is differentiating into an adipocyte. The exosome is excellent in expression rate of bioactive factors influencing the differentiation into an adipocyte and has the effect of differentiating a stem cell into an adipocyte. Accordingly, the present invention can be applied to differentiation inducing agents of a stem cell, injections for tissue regeneration, fillers for cosmetic purposes, preparations for tissue engineering, etc. The invention also relates to a cosmetic composition for skin whitening, wrinkle improvement and regeneration, containing an exosome extracted from a stem cell as an active ingredient. Since the exosome contains genes, proteins, growth factors etc. associated with the proliferation, differentiation, and regeneration of stem cells; is a purified component that does not include antibiotics, serums or culture solution harmful factors; and is a cell-derived lipid transporter, the exosome can be applied to functional cosmetic compositions having skin whitening, wrinkle improvement and skin regeneration functions and scar improving preparations for cosmetic purposes, etc.

Description

[specification] [title of invention]

COMPOSITION FOR DIFFERENTIATION INDUCTION OF ADIPOCYTE CONTAINING STEM CELL-DERIVED EXOSOME, REGENERATION OF ADIPOSE TISSUE, AND SKIN WHITENING OR WRINKLE IMPROVEMENT

[technical field]

The present invention relates to a composition for inducing differentiation of adipocytes from stem cells and/or regenerating adipose tissues using a stem cell-derived exosome containing a differentiation-inducing substance for the adipocytes. Further, the present invention relates to a cosmetic composition for skin whitening, wrinkle improvement or regeneration containing an exosome extracted from stem cells.

[background of art]

As a therapeutic method for regenerating adipose tissues, there exist a method for using a therapeutic agent comprising stem cells cultured with an adipose tissue as a substrate after three-dimensionally culturing the tissue in a hydrogel, and growth factor and an extracellular matrix secreted from the stem cell, but in order to use the therapeutic agent as an injectable preparation type, it was inconvenient to remove the hydrogel in the form of a film from a culture container and to treat it with a lyase. To overcome such inconvenience, a therapeutic method for regenerating tissues by autologous fat grafting or directly 1 transplanting stem cells has been developed.

In the case of autologous fat grafting, it uses parts of the body of a subject under operation, and thus, not only there is no feeling of rejection, but also, no immune response is observed. However, the adipose tissue is highly oxygen-dependent and interacts with neighboring cells while having many blood vessels around it, and the grafted fat hardly exhibits a blood-forming ability, and thus, it has disadvantages in that a cell apoptosis or cell necrosis may be induced due to hypoxia, and the subject may need to receive several procedures as the rate of engraftment is not high.

Formerly, stem cells have been freguently used to restore damaged tissues that have been limited by surgery or drug therapy, and biopolymers such as hyaluronic acid and collagen are used for stem cell transplantation. As the stem cells can differentiate into various cells including adipocytes, it has a wide range of applications. However, since the survival rate and the engraftment rate are low once they enter into the body, the efficiency is reduced and there is a risk that undifferentiated stem cells can form tumors.

Currently, a method for differentiating stem cells into adipocytes for tissue regeneration generally includes treating differentiation-inducing materials such as insulin, dexamethasone, isobutylmethyl xanthine, etc. on stem cells and culturing them for a long time. However, the above-mentioned stem cell differentiation-inducing materials are expensive, and 2 are not effective for differentiation only by a single component, and thus, they have disadvantages in that they must be treated by mixing various substances, and the efficiency of cell differentiation is low, which is problematic.

On the other hand, conventionally, attempts have been made to use a culture solution obtained by culturing stem cells as a cosmetic. In general, a culture medium containing an appropriate amount of antibiotics and serum is used for culturing stem cells. Most of the stem cell culture solutions developed as cosmetic compositions use a normal culture medium (see, Korean Patent No. 1237430), and a cosmetic composition in which a stem cell culture solution is encapsulated in a liposome (see, Korean Patent No. 1047873), a cosmetic composition using a culture medium prepared without the ingredients which are not permitted as raw materials for cosmetics (see, Korean Patent No. 1413686), a cosmetic composition containing a serum-free culture medium (see, Korean Patent No. 1108847) and the like have been developed.

The culture media, which are substances containing proteins, amino acids, hormones and growth factors for cell proliferation, have been prepared in a very sophisticated manner and supplied. However, since the cell culture media, antibiotics and serum have risks that are not proven, they should only be used only for research purposes and their use for the human body is prohibited. Because the components included in the culture media, such as choline chloride, hypoxanthine-sodium salt, thymidine, 3 putrescine dihydrochloride, ferric nitrate, L-glutamine and the like, are not permitted as raw materials for cosmetics, the use of such culture media is not suitable for a cosmetic composition. As such, the culture media contain various proteins, cytokines, growth factors and the like secreted by stem cells. In contrast, they also contain components such as waste products secreted as cells grow, antibiotics added to prevent contamination, or animal-derived serum, etc. and thus, they are highly likely to be exposed to various risks when used on the skin.

The technique of encapsulating the culture solutions with liposomes composed of lipids in order to increase the skin absorption rate of the stem cell culture solutions is also limited to be used as a cosmetic, as the components of the culture solutions are limited, and during the process of encapsulating into the liposomes, the deterioration and contamination of the components of the culture solutions, and an additional treatment process of encapsulating with liposomes are required.

In order to complement the disadvantages of these stem cell culture solutions, techniques for extracting stem cell-derived exosomes to use then have been developed. Stem cells are usually cultured in a medium containing antibiotics and serum. Bionanoparticles secreted from various cells present in multicellular organisms including humans can be classified into exosomes and microvesicles depending on their size and difference in secretion mechanism. It is known that exosomes, 4 which are vesicles of membrane structures secreted from various types of cells, play a variety of roles, such as transferring membrane components, proteins and RNA by binding to other cells and tissues, etc. A secretome including most of the exosomes is obtained from a cell culture supernatant, and a stem cell-derived exosome extraction method currently used is difficult to completely purify due to interference by proteins in the medium or serum in the step of extracting the secretome including the exosomes.

Accordingly, the present inventors have extracted exosomes from stem cells and confirmed that the extracted exosomes have the effects of stem cell differentiation, adipose tissue regeneration, whitening, wrinkle improvement and skin regeneration, thereby completing the present invention.

[Prior Patent Documents] (Patent Document 1) Korean Patent No. 1347190 (Patent Document 2) Korean Patent No. 1237430 (Patent Document 3) Korean Patent No. 1047873 (Patent Document 4) Korean Patent No. 1413686 (Patent Document 5) Korean Patent No. 1108847 [detailed description of the invention] [technical problem]

One object of the present invention is to provide a composition for inducing differentiation of adipocytes or regenerating adipose tissues containing, as an active ingredient, 5 an exosome extracted from stem cells differentiating into adipocytes .

Another object of the present invention is to provide a cosmetic composition comprising a composition for inducing differentiation of adipocytes or regenerating adipose tissues containing, as an active ingredient, an exosome extracted from stem cells differentiating into adipocytes.

Still another object of the present invention is to provide a medium composition for inducing differentiation of adipocytes or regenerating adipose tissues containing, as an active ingredient, an exosome extracted from stem cells differentiating into adipocytes.

Further another object of the present invention is to provide an injectable preparation comprising a composition for inducing differentiation of adipocytes or regenerating adipose tissues containing, as an active ingredient, an exosome extracted from stem cells differentiating into adipocytes, and a hydrogel.

Still further another object of the present invention is to provide a cosmetic composition for skin whitening, wrinkle improvement or regeneration containing, as an active ingredient, an exosome extracted from stem cells.

[technical solution]

One embodiment of the present invention provides a composition for inducing differentiation of adipocytes or 6 regenerating adipose tissues containing, as an active ingredient, an exosome extracted from stem cells differentiating into adipocytes .

As used herein, the "stem cells differentiating into adipocytes" refer to stem cells which are differentiating into adipocytes from adipose tissue-derived stem cells (ASCs) as shown in FIG. 1. From this, the exosomes containing genetic information, proteins and growth factors may be extracted.

Specifically, when stem cells differentiate into adipocytes, their shape is clearly changed, and the exosomes are extracted at this time. Therefore, it is different from extracting exosome from normal stem cells.

As used herein, the term "exosome" refers to a vesicle of membrane structures secreted from various types of cells, and is known to carry out various roles such as transferring membrane components, proteins and RNA by binding to other cells and tissues .

The exosome may be prepared by an exosome extraction method known in the art or may be prepared by the following steps, for example, 1) culturing stem cells in a culture medium, and then subculturing in a serum-free and non-antibiotic medium; 2) recovering the cell culture supernatant; 3) centrifuging the recovered cell culture supernatant; and 4) separating and purifying the exosomes, but is no limited thereto . 7

The stem cells differentiating into adipocytes may be bone marrow stem cells, cord blood stem cells or adipose-derived stem cells, and may be human-, animal- or plant-derived stem cells, but are not limited thereto.

The exosome may be treated on stem cells at a concentration of 1 to 150 yg per 1 mL of the composition for inducing differentiation of adipocytes or regenerating adipose tissues, specifically at a concentration of 5 to 150 yg, more specifically at a concentration of 10 to 150 yg, even more specifically at a concentration of 20 to 130 yg, and further more specifically at a centration of 20 to 100 yg, but is not limited thereto.

As used herein, the term "inducing differentiation of adipocytes" refers to induction of stem cells to differentiate into adipocytes.

The composition containing, as an active ingredient, an exosome extracted from stem cells differentiating into adipocytes according to one embodiment of the present invention may differentiate stem cells into adipocytes. Therefore, the composition may be used as a composition for inducing differentiation of adipocytes.

As used herein, the term "regenerating adipose tissues" refer to regeneration of adipose tissues by recovering damaged adipose tissues or inducing the production of deficient adipose tissues .

Further, the composition containing, as an active 8 ingredient, an exosome extracted from stem cells differentiating into adipocytes according to one embodiment of the present invention may regenerate adipose tissues. Therefore, the composition may be used as a composition for regenerating adipose tissues.

The composition for inducing differentiation of adipocytes or regenerating adipose tissues according to another embodiment of the present invention may be used as a pharmaceutical composition. Specifically, the pharmaceutical composition may be contained in an amount of 0.001 to 10 parts by weight based on 100 parts by weight of the total composition.

The pharmaceutical composition according to the above embodiment may be various oral or parenteral formulations. The formulations may be prepared using a diluting agent or an excipient, such as commonly-used fillers, weighting agents, bonding agents, wetting agents, disintegrating agents, surfactants and the like. The solid formulations for oral administration include tablets, pills, powders, granules, capsules and the like. Such solid formulations may be prepared by mixing at least one compound with at least one excipient, for example, starch, calcium carbonate, sucrose or lactose, gelatin and the like. In addition to simple excipients, lubricants, such as magnesium stearate, talc and the like may also be used. Liquid formulations for oral administration include suspension, internal liquid medicine, emulsion, syrup and the like, and in addition to commonly used simple diluents such as water and 9 liquid paraffin, it may also include various excipients, for example, wetting agents, sweetening agents, flavoring agents, preservatives and the like. The formulations for parenteral administration include sterile aqueous solutions, non-aqueous solvents, suspensions, emulsions, lyophilization formulations and suppositories.

As for the pharmaceutical composition according to the above embodiment, vegetable oil, such as propylene glycol, polyethylene glycol, and olive oil, and an injectable ester, such as ethyl oleate and the like may be used as the non-aqueous solvents and suspensions. Witepsol, macrogol, tween 61, cacao butter, laurinum, glycerol gelatin and the like may be used as a suppository base.

The dosage forms of the pharmaceutical composition according to the above embodiment may be in the form of a pharmaceutically acceptable thereof, or it may be used alone or in combination with other pharmaceutically active compounds as well as in a suitable combination. The salt is not particularly limited as long as it is pharmaceutically acceptable, and it includes, for example, hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, hydrofluoric acid, hydrobromic acid, formic acid, acetic acid, tartaric acid, lactic acid, citric acid, fumaric acid, malic acid, succinic acid, methanesulfonic acid, benzenesulfonic acid, toluenesulfonic acid, naphthalenesulfonic acid and the like.

The pharmaceutical composition according to the above 10 embodiment may be parenterally or orally administered depending on the purpose, and may be administered once or multiple times daily as needed such that the amount administered is 0.1 to 500 mg, 1 to 100 mg per kg. The effective dosage for a specific patient varies depending on the patient's body weight, age, gender, health conditions, diet, the period of administration, the mode of administration, excretion rate, the severity of the disease and the like.

According to a conventional method, the pharmaceutical compositions according to the above embodiments may be used by formulating into any form suitable for a pharmaceutical formulation including oral compositions such as powders, granules, tablets, capsules, suspensions, emulsions, syrups, aerosols and the like, external preparations such as ointments, creams and the like, suppositories and sterilized injectable preparation solutions.

The pharmaceutical compositions according to the above embodiments may be administered to mammals such as rats, mice, livestock, humans and the like in various routes such as parenteral, oral and the like, and although all routes of administration can be expected, it may preferably be administered via oral, rectal or intravenous, intramuscular, subcutaneous, intrauterine, or intracerebroventricular injection.

The pharmaceutical composition for inducing differentiation of adipocytes or regenerating adipose tissues may further include differentiation-inducing materials such as insulin, 11 dexamethasone, dehydroepiandrosterone (DHEA), histamine and isobutylmethylxanthine, etc. in order to differentiate stem cells into adipocytes, but is not limited thereto.

In another aspect, another embodiment of the present invention provides a cosmetic composition for inducing differentiation of adipocytes or regenerating adipose tissues containing, as an active ingredient, an exosome extracted from stem cells differentiating into adipocytes. The cosmetic composition may promote the regeneration of adipose tissues by inducing differentiation into adipocytes.

The exosome may be contained in the cosmetic composition at a concentration of 1 to 150 pg per 1 mL of the cosmetic composition, specifically at a concentration of 5 to 150 pg, more specifically at a concentration of 10 to 150 pg, even more specifically at a concentration of 20 to 130 pg, and further more specifically at a centration of 20 to 100 pg, but is not limited thereto.

The cosmetic composition according to the above embodiment may contain adjuvants commonly used in cosmetic or dermatological science such as fatty substances, organic solvents, solubilizing agents, thickening agents, gelling agents, softening agents, antioxidants, suspending agents, stabilizing agents, foaming agents, flavoring agents, surfactants, water, ionic or non-ionic emulsifiers, fillers, seguestering agents, chelating agents, preservatives, vitamins, blockers, wetting agents, essential oils, dyes, pigments, hydrophilic or 12 lipophilic active agents, lipid vesicles or any other ingredient commonly used in cosmetics. Such adjuvants are introduced in the amounts commonly used in the cosmetic or dermatological fields.

The external form of the cosmetic composition according to the above embodiment contains a cosmetically or dermatologically acceptable medium or base. It may be in any form suitable for topical application, for example, it may be provided in the form of solutions, gels, solids, a paste anhydrous products, emulsions obtained by dispersing oil phase in aqueous phase, suspensions, microemulsions, microcapsules, or ionic (liposomes) and non-ionic vesicle dispersants, and these compositions may be prepared according to a conventional method in the art.

The cosmetic composition according to the above embodiment is preferably applied in the form of being absorbed into the skin using a micro needle, etc., but is not limited thereto.

The cosmetic pharmaceutical composition for inducing differentiation of adipocytes or regenerating adipose tissues containing, as an active ingredient, an exosome extracted from stem cells differentiating into adipocytes may further include differentiation-inducing materials such as insulin, dexamethasone, dehydroepiandrosterone (DHEA), histamine and isobutylmethylxanthine, etc. in order to differentiate stem cells into adipocytes, but is not necessarily limited thereto.

Still another embodiment of the present invention provides a medium composition for stem cell differentiation which contains an exosome extracted from stem cells differentiating 13 into adipocytes and induces the stem cells to differentiate into adipocytes .

The exosome may be contained in the medium composition for stem cell differentiation at a concentration of 1 to 150 pg per 1 mL of the medium composition for stem cell differentiation, specifically at a concentration of 5 to 150 pg, more specifically at a concentration of 10 to 150 pg, even more specifically at a concentration of 20 to 130 pg, and further more specifically at a centration of 20 to 100 pg, but is not limited thereto.

The medium composition for stem cell differentiation may further include a stem cell culture medium, but is not necessarily limited thereto.

The medium composition for stem cell differentiation may further include differentiation-inducing materials such as insulin, dexamethasone, dehydroepiandrosterone (DHEA), histamine and isobutylmethylxanthine, etc. in order to differentiate stem cells into adipocytes, but is not limited thereto.

Further another embodiment of the present invention provides an injectable preparation comprising a composition for inducing differentiation of adipocytes or regenerating adipose tissues containing, as an active ingredient, an exosome extracted from stem cells differentiating into adipocytes; and a hydrogel.

The exosome may be contained in the injectable preparation at a concentration of 1 to 150 pg per 1 mL of the injectable 14 preparation, specifically at a concentration of 5 to 150 pg, more specifically at a concentration of 10 to 150 pg, even more specifically at a concentration of 20 to 130 pg, and further more specifically at a centration of 20 to 100 pg, but is not limited thereto.

The hydrogel may be at least one hydrogel such as gelatin, alginate, chitosan, fibrin, elastin, hyaluronic acid, collagen, methylcellulose, or collagen and methylcellulose hydrogel, but is not limited thereto.

The injectable preparation may be an injectable preparation for inducing differentiation into adipocytes or regenerating adipose tissues, but is not limited thereto. That is, when the injectable preparation of the present invention is administered into an animal via an injection, the effects of inducing differentiation into adipocytes or regenerating adipose tissues may be exhibited.

In one embodiment of the present invention, the hydrogel was prepared by adding methylcellulose powder to a collagen solution. Specifically, the methylcellulose powder was added to a collagen solution dissolved in 0.02 N acetic acid at a concentration of 3 mg/mL such that the final concentration of methylcellulose was 6% by weight. Then, the mixture was stirred at 4 °C for 1 hour to prepare collagen and methyl cellulose hydrogel.

In one embodiment of the present invention, the injectable preparation was prepared by supporting the exosomes extracted 15 from stem cells differentiating into adipocytes in the collagen and methylcellulose hydrogel. Specifically, the exosomes extracted from stem cells differentiating into adipocytes were supported in the hydrogel to a final concentration of 50 pg/mL, and then dispersed in the hydrogel by pipetting.

The injectable preparation according to the above embodiment may be administered to mammals such as rats, mice, livestock, humans and the like via oral, rectal or intravenous, intramuscular, subcutaneous, intrauterine or intracerebroventricular injection.

In one embodiment of the present invention, the exosomes extracted from the stem cells differentiating into adipocytes according to the present invention, as compared with the exosomes extracted from proliferating stem cells, show an excellent expression rate of bioactive factors affecting the differentiation into adipocytes (FIGS. 4 and 5).

In another embodiment of the present invention, when the exosome extracted from the stem cells differentiating into adipocytes according to the present invention, and the exosome extracted from the proliferating stem cells, as a control group, were added in an experiment for differentiating stem cells into adipocytes, it was confirmed that, when the exosomes according to the present invention were treated, the adipocytes were differentiated at a level similar to that of the stem cells cultured in the differentiation medium on day 7, and accordingly, oil was produced. However, in the case of the stem cells treated 16 with the exosomes extracted from the proliferating stem cells, it was confirmed that they only proliferated without being differentiated into adipocytes (FIGS. 6 and 7).

In still another embodiment of the present invention, the injectable preparation in which the exosomes extracted from the stem cells differentiating into adipocytes according to the present invention were supported in the collage/methylcellulose hydrogel showed an excellent effect on the regeneration of adipose tissues compared to the injectable preparation supported with the exosomes extracted from the proliferating stem cells (FIGS. 9 and 10).

The composition for stem cell differentiation and adipose tissue regeneration according to the above embodiment includes the exosomes containing genetic information, proteins and growth factors of adipocytes related to the differentiation of adipocytes. Thus, it can be effectively applied to the differentiation of stem cells as it is not necessary to add complex and various growth factors for differentiation. The stem cells differentiate into adipocytes by the exosomes extracted from the stem cells differentiating into adipocytes of the present invention, thereby exerting an advantageous effect on the regeneration of adipose tissues when applied in vivo. The exosome extracted from the stem cells differentiating into adipocytes of the present invention is a cell-derived material and thus is biocompatible, minimizing the side effects of the existing cell therapy agents, and the exosome itself can act as 17 a carrier, which enables easy application of the components supported therein to the human body, and therefore, it can be applied as a stem cell differentiation inducer, an injectable preparation for tissue regeneration, a filler for cosmetic purposes, a formulation for tissue engineering and the like.

Still further another embodiment of the present invention provides a cosmetic composition containing, as an active ingredient, an exosome extracted from stem cells, more specifically, a cosmetic composition for skin whitening, wrinkle-improvement or regeneration containing, an active ingredient, an exosome extracted from stem cells.

The exosome extracted from the stem cell in a serum-free and non-antibiotic medium contains extracellular matrix derivatives including collagen and growth factors effective for skin regeneration, and thus can be effectively applied for skin improvement.

In the above embodiment, the term "stem cells" refers to stem cells that proliferate. From this, it is possible to extract exosomes containing the genetic information of the stem cells, proteins and growth factors.

The stem cells may be bone marrow stem cells, cord blood stem cells or adipose-derived stem cells, and may be human-, animal- or plant-derived stem cells, but are not limited thereto.

As used herein, the term "human adipose-derived stem cells" refer to stems cells derived from adipocytes (human adipose-derived stem cells) . From this, it is possible to extract 18 exosomes containing the genetic information of the stem cells, proteins and growth factors.

The method of extracting exosomes may be carried out by a method known in the art, but is not limited thereto. In one embodiment of the present invention, the exosomes were extracted during the process of subculturing human adipose-derived stem cells. Specifically, the human adipose tissue-derived stem cells (passages 3 to 7) were cultured in a normal culture medium (Dulbecco Modified Eagle Medium, DMEM containing 10% fetal bovine serum, 1% penicillin/streptomycin). Then, 24 hours before extracting the exosomes, the cells were replaced with DMEM medium which is a serum-free and non-antibiotic medium without phenol red and maintained for 24 hours. After 24 hours, the cell culture supernatant was recovered. The recovered cell culture supernatant was centrifuged at 300xg for 10 minutes to remove the cells, and then centrifuged at 2000xg for 30 minutes to remove the cell secretion. Thereafter, the cells were concentrated by centrifugation at 5000xg for 60 minutes using a centrifuge tube equipped with a filter having a molecular weight of 3000. The supernatant obtained after the concentration was mixed with an exosome isolation reagent at a ratio of 1:0.5 and stored at 4°C for one day. An exosome precipitate was obtained by centrifugation at lOOOOxg for 60 minutes, then filtered through a 0.22 pm filter and washed with phosphate-buffered saline (PBS). The washed exosome precipitate was centrifuged at lOOOOxg for 60 minutes and resuspended in PBS (FIG. 1) . After 19 recovering the supernatant, the normal culture medium was added to the stem cells and cultured. This procedure was repeated until stem cell passage 7. The cosmetic composition was prepared using the exosomes extracted during the process of proliferating the stem cells until passage 7.

The exosome may be contained at a concentration of 1 to 150 pg per 1 mL of the cosmetic composition in the cosmetic composition for skin whitening, wrinkle improvement or regeneration, specifically at a concentration of 5 to 150 pg, more specifically at a concentration of 10 to 150 pg, even more specifically at a concentration of 20 to 130 pg, and further more specifically at a centration of 20 to 100 pg, but is not limited thereto.

In one embodiment of the present invention, the exosomes extracted from human adipose-derived stem cells were treated at a concentration of 10, 30 or 50 pg/mL, and as a result, an excellent wound healing of human foreskin fibroblasts (FIG. 18), an excellent collagen synthesis rate (FIG. 19) and a decrease in melanin synthesis (FIG. 20) were confirmed.

The exosome may be contained in the cosmetic composition in the form of a liposome encapsulated with the exosome by encapsulating the exosome into the liposome, but is not limited thereto, and the exosome may be in any form as long as it is suitable for use as a cosmetic composition. It is also possible to use the exosome itself without being encapsulated into a liposome . 20

When the exosome is used in the form of a liposome encapsulated with the exosome, the exosome may be contained in an amount of 0.1 to 10.0% by weight, more specifically in an amount of 0.1 to 1.0% by weight based on the total weight of the liposome, but is not limited thereto.

The liposome encapsulated with the exosome may be contained in an amount of 0.001 to 10.0% by weight, specifically in an amount of 0.001 to 1.0% by weight, more specifically in an amount of 0.01 to 1.0% by weight, and even more specifically in an amount of 0.01 to 0.1% by weight based on the total weight of the entire cosmetic composition, but is not limited thereto.

In one embodiment of the present invention, 3% by weight of lecithin was dispersed in an agueous phase containing 0.01% by weight of the exosomes extracted from the stem cells at room temperature (15°C) , and then a reverse micelle emulsion (water/low temperature process carbon dioxide) was formed using supercritical carbon dioxide. Then, the reaction was terminated, and the supercritical carbon dioxide was vaporized under reduced pressure to remove the supercritical carbon dioxide phase, thereby obtaining a low-temperature process liposome suspension encapsulated with the exosomes. The cosmetic composition was prepared such that the thus-prepared liposome encapsulated with the exosomes was contained in an amount of 5% by weight based on the total weight of the entire cosmetic composition.

The exosome according to the above embodiment is similar to a conventional technology in that a culture solution obtained 21 during the culturing of human adipose-derived stem cells is used. However, it is different therefrom in that the exosome in the form of a nano-vesicle present in the culture solution is extracted and purified to be used as a cosmetic ingredient, without using the culture solution as it is. When the stem cell exosomes are extracted and purified, the regeneration-related proteins, collagen derivatives and various growth factors supported in the exosomes can only be effectively used, and thus, the problems caused by the medium components including antibiotics and serum can be solved.

The exosome according to the above embodiment not only supports the genetic information of the stem cells, protein and growth factors, but also the exosome itself can serve as a carrier. The exosome composed of lipids of about 50 to 150 nm in size is biocompatible because it is a cell-derived material, and shows an excellent cell absorption rate. Therefore, it has advantages in that no additional processes of encapsulating the culture solution into the liposome are necessary as in the conventional technology, and that it can be easily applied to the skin.

Further, the cosmetic composition containing the exosomes extracted from the stem cells according to the above embodiment may be used as a formulation for improving scar. Since the stem cell derived-exosomes contain proteins and growth factors that induce cell proliferation and differentiation, and skin regeneration, they can be applied to old wounds and acne scars 22 to relieve scars. Therefore, when used as a formulation for improving scar, it can be applied in the form of sprays, a gel-type ointments and patches containing the exosome extracted from stem cells, etc.

In addition, still further another embodiment of the present invention provides a pharmaceutical composition containing, as an active ingredient, an exosome extracted from stem cells, more specifically, a pharmaceutical composition for skin regeneration containing, as an active ingredient, an exosome extracted from stem cells. Accordingly, the cosmetic composition for skin regeneration containing, as an active ingredient, an exosome extracted from stem cells according to one embodiment of the present invention may be used as a pharmaceutical composition.

The stem cells may be bone marrow stem cells, cord blood stem cells or adipose-derived stem cells, and may be human-, animal- or plant-derived stem cells, for example, they may be human adipose-derived stem cells, but are not limited thereto.

In one embodiment of the present invention, when the size of the exosome extracted from proliferating human adipose-derived stem cells (Stem-EXO) was examined, the size was about 69 nm, confirming that it is smaller than the exosome extracted from human epidermal keratinocytes (K-EXO) or the exosomes extracted from human foreskin fibroblasts (F-EXO) (FIG. 13).

In another embodiment of the present invention, when the bioactive factors involved in wrinkle improvement, whitening and 23 skin regeneration present in Stem-EXO, K-EXO and F-EXO were compared and analyzed, it was confirmed that the monocyte chemoattractant protein-1, -3 (MCP-1, -3) , chemokine ligand 5 (CCL-5) and collagenase inhibitor (the tissue inhibitor of metalloproteinase-1 (TIMP-1)) related to the mechanisms associated with promoting collagen synthesis and inhibiting the degradation thereof, interleukin-6, -8 (IL-6, -8) associated with whitening, hepatocyte growth factor (HGF), palsminogen activator inhibitor-1 (PAI-1), angiogenin and angiopoietin-1 associated with skin regeneration and angiogenesis were overexpressed in Stem-EXO compared to K-EXO and F-EXO (FIGS. 15, 16 and 17).

In still another embodiment of the present invention, the wound healing effect of the human foreskin fibroblasts in Stem-Exo was examined. As a result, when Stem-EXO was treated at a concentration of 10, 30 and 50 yg/mL, it showed an excellent effect on the migration of foreskin fibroblasts compared to K-EXO or F-EXO, thereby showing an excellent effect on would healing (FIG. 18).

In further another embodiment of the present invention, the wrinkle improvement effect of Stem-EXO was confirmed. As a result, the collagen synthesis was increased as the concentration at which the Stem-EXO was treated increased. Specifically, Stem-EXO showed a remarkably excellent collagen synthesis rate compared to K-EXO or F-EXO at 50 yg/ml, thereby confirming an excellent effect on the wrinkle improvement (FIG. 24 19) .

In still further another embodiment of the present invention, the inhibitory effect of Stem-EXO on melanin formation was examined. As a result, when Stem-EXO was treated on mouse melanoma at a concentration of 10, 30 and 50 pg/mL, it was confirmed that the melanin synthesis was decreased, thereby confirming a remarkably excellent whitening effect (FIG. 20).

[advantageous effects]

The exosomes according to the embodiment of the present invention show an excellent expression rate of bioactive factors influencing the differentiation into adipocytes and have the effect of differentiating stem cells into adipocytes, compared to the exosome extracted from proliferating stem cells. Accordingly, the present invention can be applied as stem cell differentiation inducing agents, injectable preparations for tissue regeneration, fillers for cosmetic purposes, preparations for tissue engineering, etc. Further, the exosomes according to the embodiment of the present invention are exosomes which are secreted during the proliferation of stem cells and contain genes, proteins, growth factors and the like associated with cell proliferation, differentiation and regeneration of stem cells, and thus can induce skin regeneration without other additives such as cell activators or growth factors. Furthermore, the exosomes are purified components which do not include antibiotics, serums or harmful factors of a culture solution, 25 and thus, the problems associated with culture cosmetics can be overcome, and are cell-derived lipid carriers, thereby showing excellent cell infiltration and being highly effective in delivering effective factors. Accordingly, the present invention can be applied to functional cosmetic compositions having skin whitening, wrinkle improvement and skin regeneration functions, and preparations for improving scar for cosmetic purposes, etc.

[brief description of drawings] FIG. 1 is a schematic diagram of the exosomes extracted from stem cells differentiating into adipocytes and the application thereof. FIG. 2 is a schematic diagram of the method for extracting exosomes from stem cells differentiating into adipocytes. FIG. 3 shows diagrams illustrating the characteristics of the exosomes extracted from stem cells differentiating into adipocytes; A: structure and shape of the exosomes (transmission electron microscope), B: size of the exosome (nanoparticle analyzer, dynamic light scattering), C: exosome membrane surface marker (Western Blot). FIG. 4 shows diagrams illustrating lipid-related bioactive factors in the exosomes through a microarray; A: exosomes extracted from proliferating stem cells (hASC-EXO) , B: exosome extracted from stem cells differentiating into adipocytes (D-EXO), C: adipokine array map. FIG. 5 shows a diagram illustrating the expression rate of 26 factors affecting the differentiation into adipocytes; exosomes extracted from proliferating stem cells (hASC-EXO) and exosomes extracted from stem cells differentiating into adipocytes (D-EXO) . FIG. 6 shows the result of inducing differentiation of human adipose-derived stem cells into adipocytes; A: human adipose-derived stem cells (hASCs), B: positive control group (DM) , exosomes extracted from stem cells differentiating into adipocytes (D-EXO) and exosomes extracted from proliferating stem cells (hASC-EXO). FIG. 7 shows the result of Oil red 0 staining of stem cells induced to differentiate into adipocytes; A: human adipose-derived stem cells (hASCs), B: positive control group (DM), exosomes extracted from stem cells differentiating into adipocytes (D-EXO) and exosomes extracted from proliferating stem cells (hASC-EXO). FIG. 8 shows the result of inducing the formation of adipose tissues for 3 weeks by supporting the exosomes in a hydrogel mixed with collagen and methylcellulose and subcutaneously injecting the exosomes into nude mice models; A: collagen/methylcellulose hydrogel (Gel), B: hydrogel supporting the exosomes extracted from proliferating stem cells (hASC-EXO), C: hydrogel supporting the exosomes extracted from stem cells differentiating into adipocytes (D-EXO). FIG. 9 shows the result of hematoxylin-eosin staining of the gel subcutaneously injected into nude mice models and the 27 gel supported with the exosomes extracted from proliferating stem cells (hASC-EXO) and the exosomes extracted from stem cells differentiating into adipocytes (D-EXO); A, C, E: 40x magnification; B, D, F: lOOx magnification. FIG. 10 shows the result of Oil red 0 staining of the gel subcutaneously injected into nude mice models and the gel supported with the exosomes extracted from proliferating stem cells (hASC-EXO) and the exosomes extracted from stem cells differentiating into adipocytes (D-EXO). FIG. 11 is a schematic diagram of the method of extracting exosomes from proliferating human adipose-derived stem cells. FIG. 12 shows images of human adipose-derived stem cells, human epidermal keratinocytes and human foreskin fibroblasts observed with a microscope. FIG. 13 shows diagrams illustrating the characteristics of the exosomes extracted from human adipose-derived stem cells (Stem-Exo). The exosomes extracted from human keratinocytes (K-Exo) and from human foreskin fibroblasts (F-Exo) were used as control groups. The structure and shape of the exosomes (transmission electron microscope), and the size of the exosomes (nanoparticle analyzer, dynamic light scattering) were illustrated respectively; A: Stem-Exo (scale bars indicate 50 nm (black), 100 nm (white), respectively), B: K-Exo (scale bars indicate 50 nm (black), 100 nm (white), respectively) and C: F-Exo (scale bars indicate 50 nm (black) and 200 nm (white) , respectively). 28 FIG. 14 shows diagrams comparing the expression levels of bioactive factors contained in the exosomes extracted from human adipose-derived stem cells (Stem-EXO), the exosomes extracted from human epidermal keratinocytes (K-EXO) and the exosomes extracted from human fibroblasts (F-EXO) using a microarray; A: table of microarray, B: result of microarray, C and D: graph showing the relative expression levels of bioactive factors. FIG. 15 shows graphs illustrating the expression level of bioactive factor (A: PDGF-AA, B: PDGF-AB, C: PDGF-BB, D: FGF-6, E: MCP- F: MCP-3, G: Eotaxin, H: CCL-5, I: TIMP-1) related to wrinkle improvement effect in the exosomes using a microarray; Stem-EXO: exosomes extracted from proliferating human adipose-derived stem cells, K-EXO: exosomes extracted from human epidermal keratinocytes, F-EXO: exosomes extracted from human foreskin fibroblasts. FIG. 16 shows graphs illustrating the expression level of bioactive factor (A: TGF-beta, B: TNF-alpha, C: IL-6, D: IL-8) related to whitening effect in the exosomes using g a microarray; Stem-EXO: exosomes extracted from proliferating human adipose-derived stem cells, K-EXO: exosomes extracted from human epidermal keratinocytes, F-EXO: exosomes extracted from human foreskin fibroblasts. FIG. 17 shows graphs illustrating the expression levels of bioactive factor (A: EGF, B: HGF, C: PAI-1, D: VEGF, E: Angiogenin, F: Angiopoietin-1) related to skin regeneration and angiogenesis in the exosomes using a microarray; Stem-EXO: 29 exosomes extracted from proliferating human adipose-derived stem cells, K-EXO: exosomes extracted from human epidermal keratinocytes, F-EXO: exosomes extracted from human foreskin fibroblasts . FIG. 18 shows diagrams illustrating the effect of human adipose-derived stem cell exosomes (Stem-EXO) on the migration of human fibroblasts; GM: stem cell culture medium (growth medium), SFM: serum-free medium, Stem-EXO: exosomes extracted from proliferating human adipose-derived stem cells, K-EXO: exosomes extracted from human epidermal keratinocytes, F-EXO: exosomes extracted from human foreskin fibroblasts. FIG. 19 shows a graph illustrating the effect of human adipose-derived stem cell exosomes (Stem-EXO) on collagen synthesis of human fibroblasts; SFM: serum-free medium, Stem-EXO: exosomes extracted from proliferating human adipose-derived stem cells, K-EXO: exosomes extracted from human epidermal keratinocytes, F-EXO: exosomes extracted from human foreskin fibroblasts . FIG. 20 shows a graph illustrating the effect of human adipose-derived stem cell exosomes (Stem-EXO) on the melanin synthesis of mouse melanocytes; GM: stem cell culture medium (growth medium), SFM: serum-free medium, Stem-EXO: exosomes extracted from proliferating human adipose-derived stem cells, K-EXO: exosomes extracted from human epidermal keratinocytes, F-EXO: exosomes extracted from human foreskin fibroblasts. 30 [detailed description of the embodiments]

Hereinafter, preferred embodiments are provided to help understanding of the present invention, but the embodiments are only for illustrative purposes. Further, it would be apparent to those skilled in the art that various modifications and alternative forms can be made within the scope and technical idea of the present invention, and that such modifications and alternative forms fall within the scope of the invention. <Example 1> Exosomes extracted from stem cells differentiating into adipocytes <1—1> Extraction of exosomes

In order to extract the exosomes from stem cells differentiating into adipocytes, the differentiation into adipocytes was induced by culturing the stem cells in a differentiation medium.

The differentiation into adipocytes was confirmed as lipid droplets were formed in the cytoplasm while the stem cells became gradually uneven. The differentiating stem cells were replaced with a serum-free medium and maintained for 48 hours, and the cell culture supernatant was recovered. The recovered cell culture supernatant was centrifuged at 300xg for 10 minutes to remove the cells, and then centrifuged at 2000xg for 30 minutes to remove the cell secretion. Thereafter, the cells were concentrated by centrifugation at 5000xg for 60 minutes using a centrifuge tube (molecular weight cut off= 3000, amicon 31 tube) equipped with a filter having a molecular weight of 3000. The supernatant obtained after the concentration was mixed with an exosome isolation reagent at a ratio of 1:0.5 and stored at 4°C for one day. Subsequently, the cells were centrifuged at lOOOOxg for 60 minutes to obtain an exosome precipitate, then filtered through a filter (exosome spin column) having a molecular weight of 3000, and washed with phosphate-buffered saline (PBS). The washed exosome precipitate was centrifuged at lOOOOxg for 60 minutes and resuspended in PBS (FIG. 2) <l-2> Microscopic analysis of exosomes

The size and shape of the exosomes extracted from Example 1-1 were confirmed using a transmission electron microscope and dynamic light scattering, and the surface protein of the exosomes was confirmed using Western Blot which detects a specific protein.

As a result, the exosomes extracted as shown in FIG. 3A were confirmed by a transmission electron microscope, and the size thereof was confirmed to be about 50.75 to 58.77 nm on average from FIG. 3B. In addition, as shown in FIG. 3C, an exosome-specific marker expressed on the surface of the exosome membrane was confirmed through an antibody reaction. <l-3> Analysis of proteins and bioactive factors related to adipocyte differentiation in exosomes. A microarray was used to analyze the lipid-related 32 bioactive factors present in the exosomes extracted from stem cells differentiating into adipocytes and the exosomes extracted from proliferating stem cells. The microarray was carried out through an antigen-antibody reaction, and the degree of fluorescence (Streptavidin-Cy3) expression was measured using a laser scanner (GenePix 4000B).

In addition, macrophage colony stimulating factor (MCSF), tumor necrosis factor-α (TNF-a), leptin, insulin, angiopoietinl (ANGPT1), and adipocyte complement-related protein of 30 kDa (Acrp30), all of which are bioactive factors influencing the differentiation into adipocytes among the factors expressed in the microarray analysis, were confirmed, and in this regard, the relative expression levels thereof in the exosomes extracted from the stem cells differentiating into adipocytes and from proliferating stem cells were compared.

As a result, as shown in FIGS. 4A to 4C and Table 1, it was confirmed that there are different types of lipid-related bioactive factors present in the exosomes extracted from the proliferating stem cells (hASC-EXO) and the exosome extracted from the stem cells differentiating into adipocytes (D-EXO), and it was also confirmed there was a significant difference in the expression levels of bioactive factors affecting differentiation into adipocytes (FIG. 5).

[Table 1]

hASC-EXO D-EXO Adipsin ACRP30* OPG 33

CRP ANGPT1* PDGF-AB Fas ANGPTL4 * SDF-1 IL—1 SRI IL-1R4/ST2 TECK IL-6 IL-10 TGF-β * MCP-1 Insulin* TIMP2 MCP-3 Leptin* TNF- a * PDGF-BB MCSF* XEDAR <l-4> Induction of adipocyte differentiation using exosomes In order to induce adipocyte differentiation of stem cells using the exosomes, medium compositions each containing the exosomes extracted from proliferating stem cell culture medium and the exosomes extracted from stem cells differentiating into adipocytes were used. The medium compositions were used by adding the exosomes to the stem cell culture medium at a concentration of 30, 50 and 100 pg/mL. After treating each medium composition on the cultured human adipose-derived stem cells (hASCs) , the medium compositions were replaced once in every 3 days for 14 days.

The stem cells cultured in Dulbecco's Modified Eagle's Medium High Glucose medium (DMEM) containing 5% fetal bovine serum, 1 μΜ dexamethasone, 1 pg/mL insulin, 100 μΜ indomethacin, 0.5 mM 3-isobutyl-l-methylxanthine were used as a positive control group. The stem cells treated with the exosomes extracted from proliferating stem cells were used as a positive control group. Then, the cell shape and whether the 34 differentiation was carried out were analyzed with respect to the stem cells, in which the differentiation into adipocytes was induced, using a microscope and Oil-red 0 staining for 14 days.

As a result, when the exosomes extracted from the stem cells differentiating into adipocytes (D-EXO) were treated, the stem cells were differentiated into adipocytes at a level similar to that of the human adipose-derived stem cells on day 7 (FIG. 6), and accordingly, the production of oil was confirmed (FIG. 7) . However, in the case of the stem cells treated with the exosomes extracted from proliferating stem cells (hASC-EXO) , it was confirmed that only proliferation was carried out without differentiation into adipocytes. <l-5> Cosmetic composition comprising exosomes extracted from stem cells differentiating into adipocytes

According to Example 1-1, a liposome encapsulated with the exosomes extracted from stem cells differentiating into adipocytes was prepared. Specifically, 3% by weight of lecithin was dispersed in an aqueous phase containing 0.01% by weight of the exosomes extracted from stem cells differentiating into adipocytes at room temperature (15°C) , and then a reverse micelle emulsion (water/low temperature process carbon dioxide) was prepared using supercritical carbon dioxide. Subsequently, the reaction was terminated, the supercritical carbon dioxide was vaporized under reduced pressure to remove the supercritical carbon dioxide phase, and a low temperature process liposome 35 suspension encapsulated with the exosomes extracted from stem cells differentiating into adipocytes was obtained. Here, the temperature of the reaction process was 4°C or below.

The cosmetic composition was prepared by the composition shown in Table 2 below using the liposome encapsulated with the exosomes.

[Table 2]

Compounding Ingredient Content (% by weight) Stearic acid 2 Cetyl alcohol 2 Lanolin alcohol 2 Liquid paraffin 7 Cy dome t hi cone 5 Polyoxyethylene monooleic acid ester 2 Hexanediol 2 Glycerin 3 Triethylamine 5 Carbomer 0.2 Liposome encapsulated with the exosomes according to Example 1-1 of the present invention 0.01 Purified water To 100 <l-6> Induction of adipose tissue regeneration using exosomes extracted from stem cells differentiating into adipocytes 36

In order to confirm the effect on the adipose tissue regeneration when the exosomes extracted from stem cells differentiating into adipocytes were injected into the body, the exosomes extracted from the proliferating stem cells and the exosomes extracted from stem cells differentiating into adipocytes were independently supported in a collagen/methylcellulose hydrogel.

Specifically, the hydrogel was prepared by adding methylcellulose powder to a collagen solution to form the collagen/methylcellulose hydrogel. That is, methylcellulose powder was added to a collagen solution dissolved in 0.02 N acetic acid at a concentration of 3 mg/mL such that the final concentration of methylcellulose became 6% by weight, and then the mixture was stirred at 4°C for 1 hour to prepared the gel. In the thus-prepared collagen/methylcellulose hydrogel, the exosomes extracted from the proliferating stem cells or the exosomes extracted from stem cells differentiating into adipocytes were supported. Specifically, the exosomes were supported in the collagen/methylcellulose hydrogel to a final concentration of 50 pg/mL, and then dispersed in the hydrogel by pipetting. Further, the hydrogel containing the exosomes was subcutaneously injected into the nude mice and observed for 3 weeks. The hydrogel containing no exosome was used as a negative control group, and the hydrogel containing the exosomes extracted from proliferating stem cells (hASC-EXO) was used as a positive control group (FIG. 8). Three weeks later, hematoxylin-37 eosin staining and oil red o staining were performed to confirm the regeneration of adipose tissues in the transplanted hydrogel.

As a result, a large amount of mouse cells was introduced into the gel containing the exosomes extracted from the stem cells differentiating into adipocytes (D-EXO) (FIG. 9), and a large number of adipocytes in which oil was produced were observed (FIG. 10), as compared with the negative and positive control groups. From these results, it can be concluded that the exosomes extracted from stem cells differentiating into adipocytes or the collagen/methylcellulose hydrogel supporting the exosomes was remarkably effective in inducing the regeneration of adipose tissues. <Example 2> Exosomes extracted from proliferating stem cells <2-l> Extraction of exosomes from human adipose-derived stem cells

The exosomes were extracted during the proliferation of human adipose-derived stem cells until passage 7. That is, the exosomes were extracted from the proliferating human adipose-derived stem cells.

Specifically, the human adipose tissue-derived stem cells (passages 3 to 7) were cultured in a normal culture medium (Dulbecco Modified Eagle Medium (DMEM) containing 10% fetal bovine serum, 1% penicillin/streptomycin). Then, 24 hours before extracting the exosomes, the cells were replaced with DMEM 38 medium which is a serum-free and non-antibiotic medium without phenol red and maintained for 24 hours. After 24 hours, the cell culture supernatant was recovered. The recovered cell culture supernatant was centrifuged at 300xg for 10 minutes to remove the cells, and then centrifuged at 2000xg for 30 minutes to remove the cell secretion. Thereafter, the cells were concentrated by centrifugation at 5000xg for 60 minutes using a centrifuge tube eguipped with a filter having a molecular weight of 3000 (molecular weight cut off= 3000, amicon tube). The supernatant obtained after the concentration was mixed with an exosome isolation reagent at a ratio of 1:0.5 and stored at 4°C for one day. An exosome precipitate was obtained by centrifugation at lOOOOxg for 60 minutes, then filtered through a 0.22 pm filter (exosome spin column) and washed with phosphate-buffered saline (PBS). The washed exosome precipitate was centrifuged at lOOOOxg for 60 minutes and resuspended in PBS (FIG. 11). After recovering the supernatant, the normal culture medium was added to the stem cells and cultured. This procedure was repeated until stem cell passage 7. The exosomes extracted during the process of proliferating until passage 7 were used in the following experiments. In order to compare the efficacy of the exosomes from the human adipose-derived stem cells, the exosomes were extracted from human epidermal keratinocytes and human foreskin fibroblasts in the same manner by the above method (FIG. 12). 39 <2-2> Microscopic analysis of exosomes

The size and shape of the exosomes extracted from human adipose-derived stem cells (Stem-Exo) of Example 2-1, the exosomes extracted from human epidermal keratinocytes (K-Exo) and the exosomes extracted from human foreskin fibroblasts (F-EXO) were confirmed by using a transmission electron microscope and dynamic light scattering.

As a result, the shape of each extracted exosome was confirmed by a transmission electron microscope. In addition, the sizes of the exosomes extracted from human adipose-derived stem cells, the exosomes extracted from human epidermal keratinocytes, and the exosomes extracted from human foreskin fibroblasts were about 69 nm, about 7 9.7 nm and about 94.6 nm, respectively, and the size of the exosomes (Stem-Exo) extracted from the human adipose-derived stem cells was the smallest (Figs. 13A to 13C). <2—3> Analysis of proteins and bioactive factors associated with wrinkle improvement, whitening and skin regeneration in exosomes A microarray was performed to compare and analyze the bioactive factors associated with wrinkle improvement, whitening and skin regeneration present in the exosomes extracted from human adipose-derived stem cells (Stem-Exo), exosomes extracted from human epidermal keratinocytes (K-Exo) and exosomes extracted from human foreskin fibroblasts (F-EXO). The 40 microarray was carried out through an antigen-antibody reaction, and the degree of fluorescence (Streptavidin-Cy3) expression was measured using a laser scanner (GenePix 4000B).

Through the microarray analysis, 9 bioactive factors influencing wrinkle improvement (PDFG-AA, PDGG-AB, PDGF-BB, FGF-6, MCP-1, MCP-3, Eotaxin, CCL-5, TIMP-1), 4 whitening-related bioactive factors (TGF-beta, TNF-alpha, IL-6, IL-8) and 6 bioactive factors related to skin regeneration and angiogenesis (EGF, HGF, PAI-1, VEGF, Angiogenin, Angiopoietin-1) were confirmed and in this regard, the relative expression levels of each bioactive factor in the exosomes extracted from human adipose-derived stem cells and the exosomes extracted from human epidermal keratinocytes and from human foreskin fibroblasts were compared (FIG. 14) . FIGS. 14C and 14D show the relative expression levels of the bioactive factors, and the horizontal axis indicates the exosomes from human adipose-derived stem cells and the vertical axis indicates the exosomes from epidermal keratinocytes and fibroblast exosomes, respectively. In addition, the top line and the bottom line with the middle line of the graph at the center, show 1.5-fold increase/decrease relative to the reference value, respectively. FIGS. 15A to 151 show the bioactive factors related to wrinkle improvement effect in the exosome, FIGS. 16A to 16D show the bioactive factors related to whitening effect in the exosomes, and FIGS. 17A to 17F show the bioactive factors related to skin regeneration and angiogenesis in the exosomes. 41

As a result, as shown in FIGS. 15, 16 and 17, it was confirmed that there are different types of bioactive factors present in the exosomes extracted from human adipose-derived stem cells (Stem-Exo) , the exosomes extracted from human epidermal keratinocytes (K-Exo) and the exosomes extracted from human foreskin fibroblasts (F-EXO). Specifically, it was confirmed that the monocyte chemoattractant protein-1, -3 (MCP-1, -3) , chemokine ligand 5 (CCL-5) and collagenase inhibitor (the tissue inhibitor of metalloproteinase-1 (TIMP-1)) related to the mechanisms associated with promoting collagen synthesis and inhibiting the degradation thereof, interleukin-6, -8 (IL-6, -8) associated with whitening, hepatocyte growth factor (HGF), palsminogen activator inhibitor-1 (PAI-1), angiogenin and angiopoietin-1 associated with skin regeneration and angiogenesis were over-expressed in the exosomes extracted from human adipose-derived stem cells (Stem-EXO) compared to K-EXO and F-EXO (FIGS. 15, 16 and 17). <2-4> Effect on migration effect of human foreskin fibroblasts using exosomes extracted from human adipose-derived stem cells

In order to examine the effect of the exosomes extracted from human adipose-derived stem cells on the migration of human foreskin fibroblasts, medium compositions each containing the exosomes extracted from the proliferating human adipose-derived stem cell culture medium (Stem-EXO), the exosomes extracted from 42 human epidermal keratinocytes (K-EXO) and the exosomes extracted from human foreskin fibroblasts (F-EXO) were used. The medium compositions were used by adding Stem-EXO to a DMEM serum-free culture medium at concentrations of 10, 30 and 50 pg/mL, and adding K-EXO and F-EXO to a DMEM serum-free culture medium at a concentration of 50 pg/mL. The DMEM medium containing 10% serum was used as a positive control group and the DMEM serum-free medium was used as a negative control group. The human foreskin fibroblasts were labeled with green fluorescence dye, then seeded in a 24-well plate at lxlO5 cells/well and cultured in a culture medium (DMEM containing 10% fetal bovine serum, 1% penicillin/streptomycin) for 72 hours. After culturing, an artificially uniform interval of wounds was prepared at the center of the bottom of the plate to which the cells were adhered using a sterilized yellow tip, and the medium compositions containing the exosomes was treated on each cell.

As a result, it was confirmed that the cells treated with the medium containing Stem-EXO at 24 hours showed a higher degree of migration than the cells treated with negative control, K-EXO and F-EXO, and that such tendency was even more prominent in the medium containing Stem-EXO at a concentration of 30 and 50 pg/mL. After 48 hours, the migration rapidly took place in the medium containing 10, 30 and 50 pg/mL of Stem-EXO, showing better wound healing effect compared to the media containing K-EXO and F-EXO (Figs. 18A and 18B).

Therefore, it was confirmed that the exosomes extracted 43 from human adipose-derived stem cells (Stem-Exo) showed an excellent effect on the migration of human foreskin fibroblasts compared to K-EXO or F-EXO. <2-5> Effect of exosomes extracted from human adipose-derived stem cells on wrinkle improvement

In order to examine the effect of the exosomes extracted from human adipose-derived stem cells on the collagen synthesis of human foreskin fibroblasts, medium compositions each containing the exosomes extracted from the proliferating human adipose-derived stem cell culture medium (Stem-EXO), the exosomes extracted from human epidermal keratinocytes (K-EXO) and the exosomes extracted from human foreskin fibroblasts (F-EXO) were used. The medium compositions were used by adding Stem-EXO to a DMEM serum-free culture medium at concentrations of 10, 30 and 50 yg/mL, and adding K-EXO and F-EXO to a DMEM serum-free culture medium at a concentration of 50 yg/mL. The DMEM serum-free medium was used as a negative control group. The human foreskin fibroblasts were seeded in a 48-well plate at 5xl04 cells/well and cultured in a culture medium (DMEM containing 10% fetal bovine serum, 1% penicillin/streptomycin) for 72 hours and then washed with PBS, and the medium compositions containing the exosomes were treated on each cell.

After completion of culturing, the culture solution of each well was recovered, centrifuged at 25°C at 3000 rpm for 10 minutes, and then the supernatant was taken and used for the 44 extraction and quantification of soluble collagen. Each well of the plate from which the culture solution had been removed was added with PBS and washed. Then the cells were separated from the bottom by treating trypsin (trypsin-EDTA) , and the number of cells was measured.

Sircol collagen assay kit (Biocolor, UK) was used for the quantification of soluble collagen. The thus-obtained supernatant was treated with Tris-HCl (pH 7.6) buffer mixed with polyethylene glycol and maintained at 4°C for 12 hours or more. Thereafter, the resultant was centrifuged at 12000 rpm for 10 minutes to concentrate collagen. After removing the supernatant, 1 mL of the provided collagen adsorption dye (sircol dye reagent) was added to the collagen pellet and then cultured with shaking for 30 minutes. The unadsorbed dye was removed by centrifugation at 12000 rpm for 10 minutes, and the pellet was washed with an acid-salt buffer. Then the dye adsorbed on the collagen was dissolved by treating an alkali reagent, and the absorbance was measured at a wavelength of 555 nm. The absorbance was substituted into the equation of the standard curve to calculate the amount of soluble collagen in the wells to which Stem-EXO, K-EXO, F-EXO and the negative control substance were added. The amount of corrected collagen was substituted into the equation to calculate the synthesis rate.

As a result, the soluble collagen synthesis rate for the group treated with Stem-EXO increased depending on the concentration of the exosome treated, compared with the negative 45 control group (0.138 yg). Specifically, in the case of the group treated with Stem-EXO at 50 yg/mL, the amount of collagen synthesis was 2.59 yg, which was significantly increased compared to the same amount of K-EXO (1.4 yg) or F-EXO (0.8 yg). Therefore, it can be implied that the exosomes extracted from human adipose-derived stem cells has the effect of promoting collagen synthesis of human foreskin fibroblasts (FIG. 19). <2—6> Inhibitory effect of exosomes extracted from human adipose-derived stem cells on melanin production using mouse melanoma

The whitening effect of the exosomes extracted from human adipose-derived stem cells (Stem-EXO) , and the exosomes extracted from human epidermal keratinocytes (K-EXO) and the exosomes extracted from human foreskin fibroblasts (F-EXO) as control groups was determined through the degree of inhibition of melanin production in mouse melanoma. The melanoma cells are cells that are derived from mouse melanoma and secret a melanin pigment referred to as melanin. The melanoma cells were seeded at a density of lxlO5 cells/well in a 96-well plate to adhere the cells, and then cultured for 3 days by replacing with a medium containing Stem-EXO, K-EXO and F-EXO. After 3 days, the medium was recovered and centrifuged at 4500 rpm for 10 minutes, and the absorbance was measured at 405 nm to calculate the amount of melanin released from the cells. The cells adhered to the plate were removed by treating trypsin (trypsin-EDTA), and the number 46 of cells was measured, followed by centrifugation to recover the cells. The cells were washed once with PBS and centrifuged to obtain cell pellets. To this, 1 ml of 1 N sodium hydroxide (NaOH) solution containing 10% dimethyl sulfoxide (DMSO) was added to dissolve the melanin at 80°C for 2 hours, then the resultant was added to a 96-well plate, and the absorbance was measured at 405 nm. The melanin was quantified using the measured absorbance and standardized to the protein concentration of the sample to determine the concentration of the melanin synthesis.

The exosomes extracted from human adipose-derived stem cells were treated on the melanoma cells at a concentration of 10, 30 and 50 pg/mL, and the degree of melanin synthesis was examined. As a result, it was confirmed that the melanin synthesis was reduced at all concentrations of the exosomes extracted from stem cells (FIG. 20). <2-7> Cosmetic compositions containing exosomes extracted from human adipose—derived stem cells

According to Example 2-1, a liposome encapsulated with the exosomes extracted from the proliferating human adipose-derived stem cells was prepared.

Specifically, 3% by weight of lecithin was dispersed in an aqueous phase containing 0.01% by weight of the exosomes extracted from the proliferating stem cells at room temperature (15°C) , and then a reverse micelle emulsion (water/low temperature process carbon dioxide) was prepared using 47 supercritical carbon dioxide. Subsequently, the reaction was terminated, the supercritical carbon dioxide was vaporized under reduced pressure to remove the supercritical carbon dioxide phase, and a low temperature process liposome suspension encapsulated with the exosomes extracted from the proliferating stem cells was obtained. Here, the temperature of the reaction process was 4°C or below.

The cosmetic composition was prepared by the composition shown in Table 3 below using the liposome encapsulated with the exosomes.

[Table 3]

Compounding Ingredient Content (% by weight) Stearic acid 2 Cetyl alcohol 2 Lanolin alcohol 2 Liquid paraffin 7 Cyclomethicone 5 Polyoxyethylene monooleic acid ester 2 Hexanediol 2 Glycerin 3 Triethylamine 5 Carbomer 0.2 Liposome encapsulated with the exosomes according to Example 2-1 of the present invention 0.01 Purified water To 100 48 <Formulation Example 1> Preparation of soft cosmetic water (skin)

The soft cosmetic water (skin) was prepared by the composition shown in Table 4 below using the liposome encapsulated with the exosomes extracted from the proliferating stem cells obtained by the method of Example 2-7.

[Table 4]

Compounding Ingredient Content (% by weight) Liposome encapsulated with the exosomes 0.01 according to Example 2-1 of the present invention Ethanol 10 Glycerin 3 Butylene glycol 3 Sodium hyaluronate 0.1 Triethanolamine 0.1 Antioxidants 0.1 Preservatives, flavoring, coloring 0.1 Purified water To 100 <Formulation Example 2> Preparation of nutritive cosmetic water (milk lotion)

The nutritive cosmetic water (milky lotion) was prepared by the composition shown in Table 5 below using the liposome 49 encapsulated with the exosomes extracted from the proliferating stem cells obtained by the method of Example 2-7.

[Table 5]

Compounding Ingredient Content (% by weight) Liposome encapsulated with the exosomes 0.01 according to Example 2-1 of the present invention Glycerin 5 Mineral oil 4 Beeswax 4 Polysorbate-60 1.5 Carboxyvinyl polymer 0.1 Butylene glycol 3 Squalane 5 Triethanolamine 0.15 Preservatives, flavoring, coloring 0.1 Purified water To 100 50

Claims

[claims] [Claim l] A composition for inducing differentiation of adipocytes or regenerating adipose tissues containing, as an ingredient, an exosome extracted from stem cells differentiating into adipocytes . [Claim
2] The composition for inducing differentiation of adipocytes or regenerating adipose tissues of Claim 1, wherein the stem cells differentiating into the adipocyte are bone marrow stem cells, cord blood stem cells or adipose-derived stem cells. [Claim
3] The composition for inducing differentiation of adipocytes or regenerating adipose tissues of Claim 2, wherein the bone marrow stem cells, cord blood stem cells or adipose-derived stem cells are human-, animal- or plant-derived stem cells. [Claim
4] The composition for inducing differentiation of adipocytes or regenerating adipose tissues of Claim 1, wherein the exosome is treated on stem cells at a concentration of 1 to 150 pg per 1 mL of the composition for inducing differentiation of adipocytes or regenerating adipose tissues. [Claim
5] A cosmetic composition comprising the composition for inducing differentiation of adipocytes or regenerating adipose tissues according to any one of Claims 1 to 3. [Claim
6] A medium composition for inducing differentiation of adipocytes comprising the composition for inducing differentiation of adipocytes or regenerating adipose tissues according to any one of Claims 1 to 3. [Claim
7] An injectable preparation comprising the composition for inducing differentiation of adipocytes or regenerating adipose tissues according to any one of Claims 1 to 3; and a hydrogel. [Claim
8] A cosmetic composition for skin whitening, wrinkle improvement or regeneration containing, as an active ingredient, an exosome extracted from stem cells. [Claim
9] The cosmetic composition for skin whitening, wrinkle improvement or regeneration of Claim 8, wherein the stem cells are bone marrow stem cells, cord blood stem cells or adipose-derived stem cells. [Claim
10] The cosmetic composition for skin whitening, wrinkle improvement or regeneration of Claim 8, wherein the bone marrow stem cells, cord blood stem cells or adipose-derived stem cells are human-, animal- or plant-derived stem cells. [Claim ll] The cosmetic composition for skin whitening, wrinkle improvement or regeneration of Claim 8, wherein the exosome is treated on stem cells at a concentration of 1 to 150 pg per 1 mL of the cosmetic composition for skin whitening, wrinkle improvement or regeneration. [Claim 12] The cosmetic composition for skin whitening, wrinkle improvement or regeneration of Claim 8, wherein the cosmetic is any one of formulations selected from the group consisting of skin lotion, skin softener, skin toner, astringent, lotion, milk lotion, moisturizing lotion, nutritive lotion, massage cream, nutritive cream, moisture cream, hand cream, foundation, essence, nutritive essence, face packs, soap, cleansing foam, cleansing lotion, cleansing cream, body lotion, body cleanser, cleanser, treatment, cosmetic solution, cosmetic packs, ointments, gels, liniments, liquids, patches and spray.